S
M
T
W
T
F
S
30
90°
73°
31
91°
72°
1
92°
74°
2
91°
75°
3
91°
75°
4
88°
74°
5
87°
72°
6
88°
72°
7
90°
73°
8
91°
74°
9
89°
74°
10
91°
73°
11
90°
74°
12
90°
73°
13
88°
73°
14
89°
72°
15
91°
73°
16
90°
73°
17
90°
72°
18
89°
72°
19
87°
71°
20
86°
72°
21
87°
71°
22
88°
70°
23
90°
71°
24
89°
71°
25
89°
70°
26
88°
71°
27
88°
71°
28
87°
70°
29
87°
70°
30
83°
68°
1
83°
63°
2
82°
63°
3
81°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Long Beach
Long Beach's September 2026 forecast shows daily high temperatures ranging from 81° to 92°, with overnight lows between 62° and 75°. The average high for September is 88° with an average low of 71°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Long Beach. See also: October | November | December.
